US2960275A - Flame spray gun - Google Patents
Flame spray gun Download PDFInfo
- Publication number
- US2960275A US2960275A US24789A US2478960A US2960275A US 2960275 A US2960275 A US 2960275A US 24789 A US24789 A US 24789A US 2478960 A US2478960 A US 2478960A US 2960275 A US2960275 A US 2960275A
- Authority
- US
- United States
- Prior art keywords
- nozzle
- air
- spray gun
- gas
- flame spray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/20—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion
- B05B7/201—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle
Definitions
- the present invention relates to a flame spray gun for combustible fluids, paints, and enamels, and particularly also for thermoplastics which are hardened by heating of their hardening agents. More particularly, the invention relates to a flame spray gun which is provided with a nozzle head comprising an outlet nozzle for the fluid to be sprayed and an air nozzle surrounding the fluid nozzle, and in which this nozzle head is, in turn, surrounded in a spaced relation by a heating jacket which is open toward the front and rear.
- a further object of the invention is to provide a flame spray gun in which the material to be sprayed will be heated not directly by an open flame, but indirectly through radiation.
- the invention provides the flame spray gun with a slip-on heating jacket which may be attached upon the front end of the tubular housing of the gun and then surrounds the nozzle head in a spaced relation thereto.
- This heating jacket forms a combustion chamber or burner and it consists of a pair of spaced tubular members within each other which are connected to each other at their rear ends by covering plates which are bent so that all of them together form an annular louver.
- Another feature of the invention consists in providing a cooling-air nozzle at the inside of the tubular housing and in a position so as to blow a current of cooling air into the annular space between the housing and the head of the gun so that the cold air emerging from the front end of the housing will cool the nozzle head and will thereby be heated so that it will then serve as additional heating air.
- the air and gas conduits are preferably mounted at the inside of the tubular housing and inside of the handle of the gun, and they should be adjustable by valves of a suitable kind. These valves are preferably provided within a valve block which is secured by a screw on the lower end of the handle and also carries the fittings for connecting the air and gas hoses thereto.
- the valve for regulating the air supply for the atomizing current is preferably designed so as also to regulate the coolingair current, and both currents are supplied through the same air hose and connection fitting on the lower end of the gun handle.
- Figure 2 shows a cross section taken along line -II-II of Figure 1; while Figure 3 shows a perspective rear view of the heating jacket or burner.
- the housing of the flame spray gun consists of a tubular member 1 which is secured at a suitable angle to a handle portion 2 of an oval cross section.
- the nozzle head 4 of the gun is mounted within this tubular housing 1 in such a manner that an annular channel 8 for the passage of cooling air is formed between nozzle head 4 and the tubular member 1.
- Nozzle head 4 is provided with a channel 10 through which the fluid to be sprayed is supplied.
- This channel 10 extends into a nozzle 11 which is screwed into the front end of nozzle head 4, and is provided with a needle rod 12. Needle rod 12 is adjustable in the axial direction within channel 10 and nozzle 11 and in cooperation with the latter it forms a needle valve.
- the shaft of needle rod 12 is threaded and carries a pair of knurled nuts 13 which may be adjusted to different positions along rod 12.
- a coil spring 15 surrounding needle rod 12 rests on a removable cap 16 which closes the rear end of housing 1, and it acts with its front end against nuts 13 to urge needle rod 12 forwardly to maintain the needle valve in the closed position.
- Housing 1 further has on its upper side a bearing 17 in which a lever 14 is pivotably mounted which extends transversely through the housing and through a slot 17' in the lower side thereof at a point opposite to bearing 17.
- a setscrew 18 extends through end cap 16 into housing 1 and permits the extent of the movement of needle rod 12 to be adjusted.
- nozzle head 4 which extends centrally within the tubular housing 1, is also provided with outer screw threads upon which a nozzle cap 29 is screwed so that between the inner surface of this nozzle cap and the outer surface of fluid nozzle 11 an annular channel 21 is formed which terminates into an annular nozzle opening around the central opening of nozzle 11 for supplying the necessary jet of air to carry and atomize the liquid which is ejected through nozzle 11.
- This channel 21 communicates with a bore within the wall of nozzle head 4, and bore 25 is, in turn, connected to the upper end of a tube 22 which extends first through housing 1 and then downwardly through the inside of the handle part. 2.
- the lower end of handle 2 carries a valve block 3 which is secured to the handle by a screw 23 and contains a conical valve cock 24 for regulating the current of compressed air which is supplied through the connecting fitting 26.
- a tube 23 is mounted which terminates at its upper end within housing 1 into a nozzle 29 through which a jet of cooling air is blown.
- the shaft of screw 23 has a central bore, the inner end of which extends through the wall of the shaft toward one side and com,- municates through a channel 27 in valve block 3 with valve cock 24, which is thus capable of regulating the air supply to the atomizing nozzle 21 and to the coolingair nozzle 29.
- This nozzle 29 is disposed in such a position Within housing 1 that the air current ejected therefrom will pass through the annular cooling-air channel 8 and along the nozzle head 4 so as to cool the latter. Since this cooling air Will thereby be heated, it will serve in front of nozzle head 4 as a supplementary hot-air current.
- the front end of the tubular housing I carries a heating jacket 30 which is removably fitted thereon and consists of two tubular parts 5 and 6 which are disposed coaxially within each other and are rigidly connected to each other at the rear end by an annular plate into which a plurality of radial cuts are made by stamping so as to form a series of inclined, louverlike deflecting plates 7.
- gas nozzles 31 are provided which are disposed in such a position that the nozzle openings thereof are adapted to blow currents of gas in the same general direction into the slots 32 which are formed by the deflecting plates 7, so that a strong vortex of gas will be ejected into the combustion chamber 9.
- the required fuel gas is supplied to gas nozzles 31 through an inlet tube 33 which extends along the inside of handle 2 and housing 1.
- the lower end of inlet tube 33 is connected to a passage in valve block 3 which contains a valve screw 34 for regulating the gas supply and terminates in a connecting fitting 35.
- the feed conduits 36 connect the gas nozzles 31 with the inlet tube 33 and also serve for suspending the nozzle head 4 within the tubular housing '1.
- Nozzle head 4 is further provided with a screw socket 19 to which a container (not shown) holding the material to be sprayed is to be connected.
- the fuel gas is passed through gas nozzles 31 into the combustion chamber 9 and the mixture of gas and air is then ignited, it will burn within the combustion chamber along a closely wound spiral course with the result that the inner tubular part 6 will be quickly heated to incandescence.
- This inner tube 6 which then glows dark red heats the jet of material passing from nozzle 11 by radiation. Since the flames are confined within the combustion chamber 9, they will burn steadily, and even in a strong wind there will be no danger that they will be blown out.
- the heating jacket 30 is mounted on the tubular housing 1 separately from the gas nozzles 31, it may be easily removed, permitting an easy access to the gas nozzles 31, the nozzle cap 20, and the liquid nozzle 11.
- a flame spray gun for combustible fluids having a tubular housing and a handle thereon, a nozzle head at one end of said housing having an outlet opening for supplying the fluid to be sprayed and anannular outlet opening surrounding said first outlet opening for supplying a current of air, and a heating jacket surrounding said nozzle head in a spaced relation thereto, said heating jacket comprising a pair of tubular members coaxially within and spaced from each other, and a plurality of louverlike deflecting plates having intermediate radial slots securing said tubes to each other at the rear end thereof and forming a combustion chamber between said tubes, and means disposed behind said deflecting. plates for supplying a fuel gas under pressure through said slots and along said deflecting plates so as to form a vortex of gas within said combustion chamber.
- heating jacket forms an element separate from the other parts of said gun and is adapted to be fitted upon and easily removed from the front end of said tubular housing.
- said heating jacket consists of a single piece of material comprising said tubular members and an annular plate at the rear end integrally connecting said members and having stamped portions therein forming said deflecting plates and radial slots.
- said gas supply means comprising gas nozzles at both sides of the part of said housing surrounding said nozzle head, said gas nozzles being disposed so as to blow the gas in the same direction relative to the center of said jacket into said radial slots.
- a cooling-air nozzle is provided in said tubular housing and adapted to blow a current of cooling air along said nozzle head.
- valve means are provided within a single valve block, and means for removably securing said valve block to the lower end of said handle and to the lower ends of said air and gas conduits therein, said valve means comprising a single valve for regulating the air for said annular nozzle opening and said cooling-air nozzle.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Nozzles (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW21956U DE1798628U (de) | 1959-04-29 | 1959-04-29 | Flammspritzpistole. |
DEW26334A DE1097327B (de) | 1959-04-29 | 1959-09-07 | Flammspritzpistole |
Publications (1)
Publication Number | Publication Date |
---|---|
US2960275A true US2960275A (en) | 1960-11-15 |
Family
ID=26002233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US24789A Expired - Lifetime US2960275A (en) | 1959-04-29 | 1960-04-26 | Flame spray gun |
Country Status (6)
Country | Link |
---|---|
US (1) | US2960275A (de) |
BE (1) | BE590336A (de) |
DE (1) | DE1097327B (de) |
FR (1) | FR1255798A (de) |
GB (1) | GB941708A (de) |
NL (2) | NL106353C (de) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3085750A (en) * | 1960-12-29 | 1963-04-16 | Metallizing Company Of America | Molten material spray gun with laterally deflecting air cap |
US3198434A (en) * | 1961-02-01 | 1965-08-03 | Dearborn Chemicals Co | Apparatus for applying heatreactive coatings |
US4865252A (en) * | 1988-05-11 | 1989-09-12 | The Perkin-Elmer Corporation | High velocity powder thermal spray gun and method |
US4964568A (en) * | 1989-01-17 | 1990-10-23 | The Perkin-Elmer Corporation | Shrouded thermal spray gun and method |
US5961316A (en) * | 1995-10-25 | 1999-10-05 | Weil-Mclain | Oil burner |
US6652268B1 (en) | 2003-01-31 | 2003-11-25 | Astec, Inc. | Burner assembly |
US20060180080A1 (en) * | 2005-02-11 | 2006-08-17 | Sulzer Metco Ag | Apparatus for thermal spraying |
US20080280243A1 (en) * | 2003-10-02 | 2008-11-13 | Malcolm Swanson | Burner assembly |
US20150182989A1 (en) * | 2009-01-14 | 2015-07-02 | Resodyn Corporation | Flameless thermal spray system using flame heat source |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4132357A (en) * | 1976-06-23 | 1979-01-02 | Inmont Corporation | Apparatus and method for spray application of solvent-thinned coating compositions |
DE3121370A1 (de) * | 1981-05-29 | 1983-05-19 | Korel Korrosionsschutz-Elektronik Gmbh & Co Kg, 4030 Ratingen | Pressluft-gasbrenner zum betrieb von flammspritzpistolen und als trockner |
GB2175991A (en) * | 1985-03-19 | 1986-12-10 | Proprietary Coating Ind Limite | Flame spraying gun |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1756381A (en) * | 1927-01-28 | 1930-04-29 | Pahl August | Apparatus for the production of molten liquid, coats of enamel, glass, and the like by spraying upon metal, stone, or other surfaces or bodies |
US2794677A (en) * | 1952-03-29 | 1957-06-04 | Collardin | Method of and apparatus for spraying |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1687704U (de) * | 1953-08-11 | 1954-11-25 | Gerardo Collardin | Spritzpistole. |
NL213399A (de) * | 1956-01-03 |
-
0
- NL NL250963D patent/NL250963A/xx unknown
-
1959
- 1959-09-07 DE DEW26334A patent/DE1097327B/de active Pending
-
1960
- 1960-04-26 US US24789A patent/US2960275A/en not_active Expired - Lifetime
- 1960-04-28 NL NL250963A patent/NL106353C/xx active
- 1960-04-29 BE BE590336A patent/BE590336A/fr unknown
- 1960-04-29 GB GB15138/60A patent/GB941708A/en not_active Expired
- 1960-04-29 FR FR17610A patent/FR1255798A/fr not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1756381A (en) * | 1927-01-28 | 1930-04-29 | Pahl August | Apparatus for the production of molten liquid, coats of enamel, glass, and the like by spraying upon metal, stone, or other surfaces or bodies |
US2794677A (en) * | 1952-03-29 | 1957-06-04 | Collardin | Method of and apparatus for spraying |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3085750A (en) * | 1960-12-29 | 1963-04-16 | Metallizing Company Of America | Molten material spray gun with laterally deflecting air cap |
US3198434A (en) * | 1961-02-01 | 1965-08-03 | Dearborn Chemicals Co | Apparatus for applying heatreactive coatings |
US4865252A (en) * | 1988-05-11 | 1989-09-12 | The Perkin-Elmer Corporation | High velocity powder thermal spray gun and method |
US4964568A (en) * | 1989-01-17 | 1990-10-23 | The Perkin-Elmer Corporation | Shrouded thermal spray gun and method |
US5961316A (en) * | 1995-10-25 | 1999-10-05 | Weil-Mclain | Oil burner |
US6652268B1 (en) | 2003-01-31 | 2003-11-25 | Astec, Inc. | Burner assembly |
US20080280243A1 (en) * | 2003-10-02 | 2008-11-13 | Malcolm Swanson | Burner assembly |
US20060180080A1 (en) * | 2005-02-11 | 2006-08-17 | Sulzer Metco Ag | Apparatus for thermal spraying |
US7578451B2 (en) * | 2005-02-11 | 2009-08-25 | Sulzer Metco Ag | Apparatus for thermal spraying |
US20150182989A1 (en) * | 2009-01-14 | 2015-07-02 | Resodyn Corporation | Flameless thermal spray system using flame heat source |
Also Published As
Publication number | Publication date |
---|---|
BE590336A (fr) | 1960-08-16 |
GB941708A (en) | 1963-11-13 |
NL250963A (de) | |
FR1255798A (fr) | 1961-03-10 |
NL106353C (de) | 1963-10-15 |
DE1097327B (de) | 1961-01-12 |
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